Effect of annealing temperature on the mechanical properties, thermal behavior and morphology of 尾-iPP/PA6 blends

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• 作者：Jie Li ; Rui-Ying Bao ; Wei Yang ; ^{weiyang@scu.edu.cn} ; Bang-Hu Xie ; Ming-Bo Yang
• 关键词：A. Polymers ; E. Mechanical properties ; F. Microstructure
• 刊名：Materials and Design
• 出版年：2012
• 期刊代码：56_02613069
• 类别：ms
• 出版时间：September, 2012
• 卷：40
• 期：Complete
• 页码：392-399
• 文件大小：1704 K

摘要

The correlations between the mechanical properties and microstructures of annealed pure polymers after annealing have been investigated extensively. However, the effect of annealing on the microstructures and properties of polymer blends were rarely studied. In this work, the effect of annealing temperatures (T_a) on the blend of 尾-form isotactic polypropylene (尾-iPP) and polyamide 6 (PA6) was investigated by scanning electron microscope (SEM), differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD). Both DSC and WAXD results showed that low content of 尾 nucleating agent induced both 尾₁ and 尾₂ melting peaks of 尾-iPP; the melting peak of 尾₂-iPP disappeared at the T_a of 130 掳C; at even higher T_a (above 150 掳C), 尾-iPP disappeared because of the 尾 to 伪 transition. The flexural modulus and yield strength of 尾-iPP/PA6 blends increase at high T_a (above 130 掳C), but the impact strength does not improve distinctly at the whole range of T_a studied due to the poor interfacial interaction between iPP and PA6.